The observation that charges flowing through one quantum wire can drag charges in a second, unconnected wire either forwards or backwards requires a re-interpretation of Coulomb drag.
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Büttiker, M., Sánchez, R. A closer look at charge drag. Nature Nanotech 6, 757–758 (2011). https://doi.org/10.1038/nnano.2011.197
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DOI: https://doi.org/10.1038/nnano.2011.197
